Effects of high pressure on the electrical resistivity and dielectric properties of nanocrystalline SnO 2

Wenshu Shen, Tianji Ou, Jia Wang, Tianru Qin, Guozhao Zhang, Xin Zhang, Yonghao Han, Yanzhang Ma, Chunxiao Gao

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7 Scopus citations

Abstract

The electrical transport and structural properties of tin oxide nanoparticles under compression have been studied by in situ impedance measurements and synchrotron X-ray diffraction (XRD) up to 27.9 GPa. It was found that the conduction of SnO2 can be improved significantly with compression. Abnormal variations in resistivity, relaxation frequency, and relative permittivity were observed at approximately 12.3 and 25.0 GPa, which can be attributed to pressure-induced tetragonal- orthorhombic-cubic structural transitions. The dielectric properties of the SnO2 nanoparticles were found to be a function of pressure, and the dielectric response was dependent on frequency and pressure. The dielectric constant and loss tangent decreased with increasing frequency. Relaxation-type dielectric behaviour dominated at low frequencies. Whereas, modulus spectra indicated that charge carrier short-range motion dominated at high frequencies.

Original languageEnglish
Article number5086
JournalScientific reports
Volume8
Issue number1
DOIs
StatePublished - Dec 1 2018

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